用于删除方法的 Rails 自定义 Twitter Bootstrap 模式，回调问题

问题描述

以下代码确实会按预期销毁记录，但回调是从一个模式继承到下一个模式.因此，当一条记录被正确删除时，Rails 也一直在寻找删除以前删除的记录.我正在使用 Twitter Bootstrap 模式窗口，它位于 Rails 视图模板中，并在触发标准 Rails 删除方法时显示，替换了常规的 javascript 对话框.

Following code does destroy records as intended, but the callback is inherited from one modal to the next one. So while a record is properly deleted, Rails keeps looking to delete the formerly deleted ones as well. I'm using a Twitter Bootstrap modal window, that sits in a Rails view template and is shown when a standard Rails delete method is fired, replacing the regular javascript dialog.

回调被触发后如何清除?

How to clear the callback after it has been fired?

$.rails.allowAction = function(element) {

  var message = element.data('confirm'),
  answer = false, callback;
  if (!message) { return true; }

  if ($.rails.fire(element, 'confirm')) {
    myCustomConfirmBox(message, function() {
     callback = $.rails.fire(element,
       'confirm:complete', [answer]);
     if(callback) {
       var oldAllowAction = $.rails.allowAction;
       $.rails.allowAction = function() { return true; };
       element.trigger('click');
       $.rails.allowAction = oldAllowAction;
     }
    });
  }
  return false;
}

function myCustomConfirmBox(message, callback) {
    $('#dialog-confirm').modal('show');
    $('#dialog-confirm button.primary').click(function(){
        callback();
        $('#dialog-confirm').modal('hide');
    });
}

由于我对任何删除操作一遍又一遍地使用相同的基本模式，因此回调排队.所以当一个删除动作之前被取消时，它仍然会在另一个对象的另一个删除实例上被触发，因为回调仍然有效.底线:如何清除回调队列?

edit: Since I'm using the same base modal over and over again for any delete action, the callbacks queue up. So when a delete action has been cancelled before, it will still be triggered on another delete instance of a different object, since the callback is still valid. Bottom line: How to clear the callback queue?

推荐答案

事实证明，由于各种原因，摆弄本机删除方法/回调是一个坏主意.我的解决方法如下.

Turns out it is a bad idea to fiddle with the native delete method/callback for various reasons. My workaround solution is as follows.

在你的视图中有一个删除"按钮，带有一些 JS 数据值:

Have a "delete" button in your view, with some JS data values:

#delete button in view template
link_to "delete", "#", 
   :class => "delete_post", 
   "data-id" => YOUR_POST_ID, 
   "data-controls-modal" => "YOUR_MODAL_LAYER",
       #more bootstrap options here…

Bootstrap 打开模态窗口.在里面，有另一个删除"按钮，设置了远程"，所以动作将使用 JS.

Bootstrap opens the modal window. Inside that, have another "delete" button with "remote" set, so the action will use JS.

#delete button in modal window
link_to "delete", post_path(0), 
   :method => :delete, 
   :class => "btn primary closeModal", 
   :remote => true  

CloseModal 是另一个 :class 让我知道何时关闭引导模式窗口.我在 application.js 中为此添加了一个附加函数.注意，默认的path有一个nil值，我们将在下一步通过data-id"参数附加要通过JS删除的真实帖子ID:

CloseModal is another :class for me to know when to close the bootstrap modal window. I've put an additional function for that in my application.js. Note, the default path has a nil value, we'll attach the real post ID to be deleted via JS in the next step via the "data-id" param:

#application.js 
$('a.delete_post').live('click', function(){
    _target = $(this).data('id');
    $('#YOUR_MODAL_LAYER .primary').attr('href', '/posts/' + _target);
});

我们的 Posts 控制器中的 destroy 动作将使用 JS 为已删除的帖子渲染动画:

The destroy action in our Posts controller will use JS to render an animation for the deleted post:

#posts_controller.rb
def destroy
    @post = Post.find(params[:id])
    @post.destroy
    respond_to do |format|
       # format.html { redirect_to(posts_url) }
       format.js { render :content_type => 'text/javascript' }
    end
end

请随意在此处插入效果.在此示例中，我们只是淡出已删除的帖子:

Insert here effects as you please. In this example we are simply fading out the deleted post:

#views/posts/destroy.js    
$("div#post-<%= params[:id] %>").fadeOut();

总的来说，这真的很顺利！

Altogether this works really smoothly!

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